Tuna Empanaditas

Ingredients

1 2 1/4-inch round cookie cutter

1 6-oz can light tuna in olive oil

2 tablespoons capers

½ cup pimiento-stuffed green olives

½ cup onion

1 17 1/4-oz package frozen puff pastry sheets

Preheat oven to 400°F. Pour oil from tuna into a medium skillet. Add onion to skillet and cook over moderate heat, stirring occasionally, until softened, 3 to 4 minutes. Mash tuna in a bowl with a fork, then stir in onion, olives, and capers. Season generously with pepper and very lightly with sa...